We own over a dozen books for My First LeapPad. This particular book is my daughter's second favorite. In fact, we own two versions of it, one in English and the other in French.
My wife and I purchased this book because our daughter needed help with her fine motor skills, especially when it came to writing letters and numbers. She wasn't lagging or anything, but she made the mistakes all three-year-olds make when trying to write.
Through fun activities, this book taught her to write in strait lines as well as proper curved lines. She learned to correctly print both capital and small letters. She also learned to correctly write her numbers. We were pleasantly surprised by how much this book improved our daughter's fine motor skills and control over a pen.
Additionally, since her French lagged her English, the French version of this book taught her the alphabet in French and well as all her numbers in this language. Had she not already known these things in English, I imagine it would have taught her these as well.
This book is definitely one of My First LeapPad's best.